Ore-mill



(No Model.)

J. s. KINESLAND. ORE MILL.

No. 425,886. Patented Apr. 1

UNITED STATESY PATENT OFFICE..

JAMES S. KINGSLAND, OF FLATBUSH, NEINT YORK.

ORE-MILL.

SPECIFICATION forming part of Letters Patent No. 425,886, dated April 15, 1890.

Application filedJanuary 24, 1890. Serial No. 338,004. (No model.) l

such as will enable others skilled in the artv to which itappertains to make and use the same.

The'object of the invent-ion is to provide means for grinding ores and other substances,

. which shall be simple in Vconstruction. and

efficient and durable in operation; and it consists in the matters hereinafter described, and pointed out in the clailns.

In the accompanying drawings, Figure l is a longitudinal section of the improved mill,

and Fig. 2 is an elevation of the discharging end. Figs. 3 and t are side elevations of rings, and Figs. 5 and G are views of modified forms.

rlhe improvement may be applied to revolving cylinders of a well-known type-#such as indicated at Fig. l in the drawings. These may be'mounted on friction-rollers and revolved by gearing of any approved kind. Within the cylinder is placed a series of heavy rings 2 in such manner that they each rest upon an edge or on one side of the curvilinear face of the ring, as at 3. Preferably the rings are held in an inclined posi-tion and so as to stand upon an edge, as above stated, by the inclined inner faces of the cylinderheads. In the position illustrated these heads hold the ringsso that they stand upon the edges opposite the end in which is the charging-inlet 4, while the edges nearest said end are elevated slightly above the bottom of -the cylinder; but it is obvious that when the cylinder with its contained rings is caused to revolve the inclinationof the inner faces of the cylinder-heads will be reversed with each half-revolution and that continued rotation will impart to the rings a movement in the direction of the axis of the cylinder of an oscillatory character, whereby particles of ore or other material falling under the rings will be crushed against thc cylinder-wall.

The rings are preferably made of different diameters, whereby they move with unequal velocity when revolved by the rotating cylinder, whereby they grind the material between their faces. To increase this effect, as well as to facilitate the centrifugal movement of the material, the inner circumferential edges of the rings are ehamfered or beveled, as indicated at 5 and G, and preferably at different angles. For example, one bevel may yhave an inclination to the main face of the ring of twenty-two and one-half degrees and another one of forty-five degrees, but these angles may be varied. Their effect is to increase the movement of the contents of the space inclosed by the rings and to increase the grinding eect produced by their faces.

`Thus the face 13 of a small ring will, by the revolution of the cylinder,be brought against the bevel 5 of a larger ring, and the face 13 of a larger ring will be brought in contact with the edge of a smaller ring, whereby a variety of grinding contacts are produced.

At 7 are indicated passages radially disposed in the ring-faces, which passages receive material and facilitate its centrifugal movement, and as the rings move with different angular velocities, because of the inequality of their diameters, said passages .in the different rings will be carried rby each other in such manner that their edges will have a shearing action.

In some cases the rings are cored out to provide an interior chamber adapted to receive water, mercury, or other fluid, whereby the temperature or the movement of the rings, or both temperature and motion, may be modified. Thus, for example, water or other fluid colder than the contents of the cylinder would tend to prevent rise of temperature, and it could also be used to cause a variable center of gravity in aring, and thus retard or modify its rotary movement.

At the delivery end of the cylinder one -or more exit-openings 8 are provided, and by preference two or more are employed and arranged with gravitating covers or slides 9, automatically moving in dovetailed ways in such manner that they will drop by gravity and close each opening when it is broughtby the revolution of the cylinder to its lower position, and will in like manner uncover said opening when it approaches its highest position. The effect of this construction is to r 1 'A A 425,856

prevent the ground material from leaving the cylinderexcept through an opening in its upper part. The size of this opening or of l such openings may be regulated by an adjustable block l0, fastened at will by a setscrew, and this device can also be used when desired to temporarily close the exits.

In Fig. 2 the lower discharge-opening is shown as closed by the sliding cover 9, after it has been moved down to its lowest position by gravity. As the cylinder revolves, this cover will be moved in its ways or guides by gravity, so as to open the discharge, as indicated at the upper part of said figure. The blocks are made adjustable toward and from the openings, and are secured in any desired position by set-screws. As represented, they are set to permit the openings 8 to be entirely uncovered by the falling of the covers 9; but the blocks may be moved towardsaid openings and fastened by screws or otherwise, so that the sliding covers are prevented from lnoving to uncover/,the discharge-openings entirely, or, if desired, so as tof close the openings during the entire revolution. It is obvious that the set-screws could `be otherwise applied, or that well-known equivalents could be substituted.

- The exit end of the cylinder is preferably provided with an annular ring or skirt 1], having interior blades or wings 12, which l may have an oblique arrangement, as indicated. These wings will cause a slight aircurrent, tending to withdraw the tine mateare being revolved, and finds its way into and through the interior passage formed by the central holes in the several rings and into the spaces produced by the chamfered inner edges of the rings, and into the passages 7,

and `to a small extent between the plane l faces of said rings and underneath their circumferential faces, in which situations it is crushed or ground and speedily reduced to a sufficient degree of iineness. The escape from the cylinder is regulated by the gravitating covers of the exits, as before stated. The

otherwise empty spaces of the cylinder and grinding-rings will be filled with the ore or other material in constant motion and subjected at dierent points to a varietyy of pulverizingactions. The rings, for example, will break and crush under their lowest faces, while they will rub or triturate between their parallel faces, and the edges of the passages 7 will have a shearing eect, as will also the outer edges of the smaller rings. The passage of material through the revolving cylinder can` be regulated or altogether suspended for a time, if found desirable.

The mill is ordinarily full of the material hardness.

being ground, which willv be forced along toward the 'delivery end by the rotation of the cylinder and the con sequent movement of the rings and material. The return of the latter toward the inlet is'hindered by the fresh charge and also by a suitable inclination of 4the cylinder, if necessary. The blades 12 also produce .sufficient draft to remove the finelyground material from an open exit, and said material can be received and conveyed away in any usual or convenientmanner.

` It will be obvious that the invention is independent of the material used in the construction of the machine. Cast-iron is suitable for the purpose, and preferably the rings and cylinder are made of the same degree of The number of the rings is not of the gist of the invention, nor the number of f without sacrificing all the advantages of the Limprovement, as also might be the chamfering of the inner edges of the rings.

More than two sizes of rlngs could be eml ployed, and a part only could be provid ed with diametric passages or with beveled edges.

A crushing action of the rings might be produced by providing their peripheries with oblique faces, as indicated in Fig. 5.

Various other particulars may be modified by mechanical skill without essentially alterfing the principles of operation.

Having thus described my invention, what I desire to secure by Letters Patent, is-

1. In a grinding apparatus, a cylinder pro- ;vided with suitable inlet and outlets, and means for rotating it, in combination with 5 ringsloosely placed side by side in its interior, f said rings being of unequal diameters and provided with faces 13, and having their inlner edges chamfered, substantially as set "-fortll.

2. In a grinding apparatuaa cylinder provided with suitable inlet and outlets, and havingb the inner faces of its head inclined to its axis, in combination with rings loosely placed in its interior, substantially as set forth.

3. In a grinding apparatus, a cylinder provided with two or more exits having gravitating covers placed at different points around the axis of the cylinder and ladapted to be automatically opened and closed by the revolution of the cylinder, substantially as set forth.

4. In a` grinding apparatus,a cylinder provided with two or more exits having gravitating covers placed at different points around jthe passages 7, and these might be omitted IOO IIO

the axis of the cylinder and adapted to lbe automatically opened and closed by the revoluti on of the cylinder, and set-screws for regulating the extent of .the movement of the covers, substantially as set forth. Y

y In testimony whereofl aliix my signature in presence of two witnesses.

JAMES S. KINGSLAND.

Witnesses:

Trios. S. HOPKINS, BENJ. R. OATLIN. 

